MAX1179ACUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Rangeapplications.D9 2 27D6The MAX1179/MAX1187/MAX1189 are available in aD5D10 3 2628-pin TSSOP package ..
MAX1179AEUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeApplicationsD14 7 22 D1D15 8 21 D0Temperature Sensing and MonitoringR/C 9 20 DVDDIndustrial Process ..
MAX1179AEUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeELECTRICAL CHARACTERISTICS(AV = DV = +5V ±5%, external reference = +4.096V, C = 10µF, C = 0.1µF, V ..
MAX1179BCUI+ ,16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input RangeApplicationsD14 7 22 D1D15 8 21 D0Temperature Sensing and MonitoringR/C 9 20 DVDDIndustrial Process ..
MAX117CAI ,+3V / 400ksps / 4/8-Channel / 8-Bit ADCs with 1UA Power-DownFeatures' +3.0V to +3.6V Single-Supply Operation The MAX113/MAX117 are microprocessor-compatible,8- ..
MAX117CAI ,+3V / 400ksps / 4/8-Channel / 8-Bit ADCs with 1UA Power-DownApplications*Dice are specified at T = +25°C, DC parameters only.ABattery-Powered Systems Portable ..
MAX3488EESA+T ,3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490CPA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490CPA ,3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490CPA+ ,3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers
MAX3490ECSA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3490ECSA ,3.3V-Powered / 15kV ESD-Protected / 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX1179ACUI+-MAX1179AEUI+-MAX1179BCUI+-MAX1187AEUI+-MAX1187BCUI+-MAX1187BEUI+-MAX1189ACUI+-MAX1189AEUI+-MAX1189BEUI+
16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range19-2675; Rev 1; 1/03
General DescriptionThe MAX1179/MAX1187/MAX1189 16-bit, low-power,
successive-approximation analog-to-digital converters
(ADCs) feature automatic power-down, a factory-
trimmed internal clock, and a 16-bit wide parallel inter-
face. The devices operate from a single +4.75V to
+5.25V analog supply and feature a separate digital
supply input for direct interface with +2.7V to +5.25V
digital logic.
The MAX1179 accepts a bipolar input voltage range of
±5V. The MAX1187 accepts an analog input voltage
range from 0 to +10V, while the MAX1189 accepts a
bipolar analog input voltage range of ±10V. All devices
consume only 23mW at a sampling rate of 135ksps
when using an external reference and 29mW when
using the internal +4.096V reference. AutoShutdown™
reduces supply current to 0.4mA at 10ksps. The
MAX1179/MAX1187/MAX1189 are ideal for high-perfor-
mance, battery-powered data-acquisition applications.
Excellent AC performance (THD = -100dB) and DC
accuracy (±2LSB INL) make the MAX1179/MAX1187/
MAX1189 ideal for industrial process control, instrumen-
tation, and medical applications.
The MAX1179/MAX1187/MAX1189 are available in a
28-pin TSSOP package and are fully specified over the
-40°C to +85°C extended temperature range and the
0°C to +70°C commercial temperature range.
ApplicationsTemperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
FeaturesAnalog Input Voltage Range: ±10V, ±5V, or 0 to 10V16-Bit Wide Parallel InterfaceSingle +4.75V to +5.25V Analog Supply VoltageInterfaces with +2.7V to +5.25V Digital Logic±2LSB INL (max)±1LSB DNL (max)Low Supply Current (MAX1189)
5.3mA (External Reference)
6.2mA (Internal Reference)
5µA AutoShutdown ModeSmall Footprint
28-Pin TSSOP Package
Ordering InformationPART TEMP RANGE PIN-PACKAGE INPUT VOLTAGE
RANGE INL (LSB)
MAX1179ACUI0°C to +70°C28 TSSOP±5V±2
MAX1179BCUI0°C to +70°C28 TSSOP±5V±2
REFADJ
DVDD
DGND
RESET
REF
AGND
AIN
AGND
AVDD
D15
D14
D13
D12
D11
D10
TSSOPTOP VIEW
MAX1179
MAX1187
MAX1189
R/C
EOC
Pin ConfigurationAutoShutdown is a trademark of Maxim Integrated Products, Inc.
Ordering Information continued at end of data sheet.
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
ABSOLUTE MAXIMUM RATINGSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
AVDDto AGND.........................................................-0.3V to +6V
DVDDto DGND.........................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AIN to AGND.....................................................-16.5V to +16.5V
REF, REFADJ to AGND............................-0.3V to (AVDD+ 0.3V)
CS, R/C, RESET to DGND........................................-0.3V to +6V
D_, EOCto DGND...................................-0.3V to (DVDD+ 0.3V)
Maximum Continuous Current Into Any Pin........................50mA
Continuous Power Dissipation (TA= +70°C)
28-Pin TSSOP (derate 12.8mW/°C above +70°C).....1026mW
Operating Temperature Range
MAX11_ _ _CUI...................................................0°C to +70°C
MAX11_ _ _EUI................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC ACCURACYResolutionRES16Bits
MAX11_ _A-1+1
MAX11_ _B-1.0+1.5Differential NonlinearityDNLNo missing codes
over temperature
MAX11_ _C-1+2
LSB
MAX11_ _A-2+2
MAX11_ _B-2+2Integral NonlinearityINL
MAX11_ _C-4+4
LSB
RMS noise, external reference0.6Transition NoiseInternal reference0.75LSBRMS
Offset Error-100+10mV
Gain Error0±0.2%FSR
Offset Drift16µV/°C
Gain Drift±1ppm/°C
AC ACCURACY (fIN = 1kHz, VAIN = full range, 135ksps)Signal-to-Noise Plus DistortionSINAD8690dB
Signal-to-Noise RatioSNR8791dB
Total Harmonic DistortionTHD-100-92dB
Spurious-Free Dynamic RangeSFDR92103dB
ANALOG INPUTMAX1179-5+5
MAX11870+10Input RangeVAIN
MAX1189-10+10
MAX1179/MAX1187Normal operation5.36.99.2
MAX1179Shutdown mode3
MAX1177Shutdown mode5.3
Normal operation7.81013.0
Input ResistanceRAIN
MAX1189Shutdown mode6
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSNormal operation-1.8+0.4MAX1179,
-5V ≤ VAIN ≤ +5VShutdown mode-1.8+1.8
MAX1187,
0 ≤ VAIN ≤ +10V
Normal/shutdown
mode-0.1+2.0
Normal operation-1.8+1.2
Input CurrentIAIN
MAX1189,
-10V ≤ VAIN ≤ +10VShutdown mode-1.8+1.8
MAX1179, VAIN = +5V, shutdown mode to
operating mode11.4
Input Current Step at Power-UpIPU
MAX1189, VAIN = +10V, shutdown mode to
operating mode0.50.7
Input CapacitanceCIN10pF
INTERNAL REFERENCEREF Output VoltageVREF4.0564.0964.136V
REF Output Tempco±35ppm/°C
REF Short-Circuit CurrentIREF-(SC)±10mA
EXTERNAL REFERENCEREF and REFADJ Input Voltage
Range3.84.2V
REFADJ Buffer Disable ThresholdAVDD -
AVDD -
0.1V
Normal mode, fSAMPLE = 135ksps60100REF Input CurrentIREFShutdown mode (Note 1)±0.1±10µA
REFADJ Input CurrentIREFADJREFADJ = AVDD16µA
DIGITAL INPUTS/OUTPUTSOutput High VoltageVOHISOURCE = 0.5mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V
DVDD -
0.4V
Output Low VoltageVOLISINK = 1.6mA, DVDD = +2.7V to +5.25V,
AVDD = +5.25V0.4V
Input High VoltageVIH0.7 ×
DVDDV
Input Low VoltageVIL0.3 ×
DVDDV
Input Leakage CurrentDigital input = DVDD or 0V-1+1µA
Input HysteresisVHYST0.2V
Input CapacitanceCIN15pF
Three-State Output LeakageIOZ±10µA
Three-State Output CapacitanceCOZ15pF
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Note 1:Maximum specification is limited by automated test equipment.
Note 2:To ensure best performance, finish reading the data and wait tBRbefore starting a new acquisition.
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= +5V ±5%, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, TA= TMINto TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLIESAnalog Supply VoltageAVDD4.755.25V
Digital Supply VoltageDVDD2.705.25V
MAX11872.9External reference,
135kspsMAX1179/MAX11894.05.3
MAX11873.8Analog Supply CurrentIAVDD
Internal reference,
135kspsMAX1179/MAX11895.26.2
Shutdown mode, IAVDD + IDVDD (Note 1),
digital input = DVDD or 0V0.55µAShutdown Supply CurrentISHDN
Standby mode3.7mA
Digital Supply CurrentIDVDD0.75mA
Power-Supply RejectionAVDD = DVDD = +4.75V to +5.25V3.5LSB
TIMING CHARACTERISTICS (Figures 1 and 2)(AVDD= +5V ±5V, DVDD= +2.7V to AVDD, external reference = +4.096V, CREF= 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD
= 20pF, TA= TMINto TMAX.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMaximum Sampling RatefS AM P LE ( M A X ) 135ksps
Acquisition TimetACQ2µs
Conversion TimetCONV4.7µs
CS Pulse Width HightCSH(Note 2)40ns
DVDD = +4.75V to +5.25V40CS Pulse Width LowtCSL(Note 2)DVDD = +2.7V to +5.25V60ns
R/C to CS Fall Setup TimetDS0ns
DVDD = +4.75V to +5.25V40R/C to CS Fall Hold TimetDHDVDD = +2.7V to +5.25V60ns
DVDD = +4.75V to +5.25V40CS to Output Data ValidtDODVDD = +2.7V to +5.25V80ns
EOC Fall to CS FalltDV0ns
DVDD = +4.75V to +5.25V40CS Rise to EOC RisetEOCDVDD = +2.7V to +5.25V80ns
DVDD = +4.75V to +5.25V40Bus Relinquish TimetBRDVDD = +2.7V to +5.25V80ns
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
INL vs. CODEMAX1179/87/89 toc01
CODE
INL (LSB)
DNL vs. CODE
MAX1179/87/89 toc02
CODE
DNL (LSB)
SUPPLY CURRENT (AVDD + DVDD)
vs. TEMPERATURE
MAX1179/87/89 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (mA)40-20020
5.25V
5.0V
4.75V
fSAMPLE = 135ksps
SHUTDOWN MODE BETWEEN
CONVERSIONS
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATEMAX1179/87/89 toc04
SAMPLE RATE (ksps)
SUPPLY CURRENT (mA)
STANDBY MODE
SHUTDOWN MODE
GAIN ERROR
vs. TEMPERATURE
MAX1179/87/89 toc07
TEMPERATURE (°C)
GAIN ERROR (%FSR)
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATUREMAX1179/87/89 toc05
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (40-20020
NO CONVERSIONS
OFFSET ERROR vs. TEMPERATUREMAX1179/87/89 toc06
TEMPERATURE (°C)
OFFSET ERROR (mV)40-20020
MAX1189
INTERNAL REFERENCE
vs. TEMPERATURE
MAX1179/87/89 toc08
TEMPERATURE (°C)
INTERNAL REFERENCE (V)
FFT AT 1kHzMAX
1179/87/89 toc09
FREQUENCY (kHz)
MAGNITUDE (dB)20
fSAMPLE = 135ksps
Typical Operating Characteristics(AVDD= DVDD= +5V, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD= 20pF, TA= TMINto
TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Typical Application Circuit)
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
SINAD vs. FREQUENCYMAX1179/87/89 toc10
FREQUENCY (kHz)
SINAD (dB)
fSAMPLE = 131ksps
SPURIOUS-FREE DYNAMIC RANGE
vs. FREQUENCYMAX1179/87/89 toc11
FREQUENCY (kHz)
SFDR (dB)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX1179/87/89 toc12
FREQUENCY (kHz)
THD (dB)
Pin Description
PINNAMEFUNCTIOND8Three-State Digital Data OutputD9Three-State Digital Data OutputD10Three-State Digital Data OutputD11Three-State Digital Data OutputD12Three-State Digital Data OutputD13Three-State Digital Data OutputD14Three-State Digital Data OutputD15Three-State Digital Data Output (MSB)
9R/C
Read/Convert Input. Power up and place the MAX1179/MAX1187/MAX1189 in acquisition mode by
holding R/C low during the first falling edge of CS. During the second falling edge of CS, the level
on R/C determines whether the reference and reference buffer power down or remain on after
conversion. Set R/C high during the second falling edge of CS to power down the reference and
buffer, or set R/C low to leave the reference and buffer powered up. Set R/C high during the third
falling edge of CS to put valid data on the bus.EOCEnd of Conversion. EOC drives low when conversion is complete.AVDDAnalog Supply Input. Bypass with a 0.1µF capacitor to AGND.AGNDAnalog Ground. Primary analog ground (star ground).AINAnalog InputAGNDAnalog Ground. Connect pin 14 to pin 12.
Typical Operating Characteristics (continued)(AVDD= DVDD= +5V, external reference = +4.096V, CREF = 10µF, CREFADJ= 0.1µF, VREFADJ= AVDD, CLOAD= 20pF, TA= TMINto
TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Typical Application Circuit)
Detailed Description
Converter OperationThe MAX1179/MAX1187/MAX1189 use a successive-
approximation (SAR) conversion technique with an
inherent track-and-hold (T/H) stage to convert an ana-
log input into a 16-bit digital output. Parallel outputs
provide a high-speed interface to microprocessors
(µPs). The Functional Diagramat the end of the data
sheet shows a simplified internal architecture of the
MAX1179/MAX1187/MAX1189. Figure 3 shows a typical
application circuit for the MAX1179/MAX1187/MAX1189.
Analog Input
Input ScalerThe MAX1179/MAX1187/MAX1189 have an input scaler
which allows conversion of true bipolar input voltages
and input voltages greater than the power supply, while
operating from a single +5V analog supply. The input
scaler attenuates and shifts the analog input to match
the input range of the internal DAC. The MAX1179 input
voltage range is ±5V, while the MAX1189 input voltage
range is ±10V. The MAX1187 has a unipolar input volt-
age range of 0 to +10V. Figure 4 shows the equivalent
input circuit of the MAX1179/MAX1187/MAX1189. This
circuit limits the current going into or out of AIN to less
than 1.8mA.
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Pin Description (continued)
PINNAMEFUNCTIONREFADJReference Buffer Output. Bypass REFADJ with a 0.1µF capacitor to AGND for internal reference
mode. Connect REFADJ to AVDD to select external reference mode.REFReference Input/Output. Bypass REF with a 10µF capacitor to AGND. REF is the external reference
input when in external reference mode.RESETReset Input. Logic high resets the device.CS
Convert Start. The first falling edge of CS powers up the device and enables acquisition when R/C
is low. The second falling edge of CS starts conversion. The third falling edge of CS loads the result
onto the bus when R/C is high.DGNDDigital GroundDVDDDigital Supply Voltage. Bypass with a 0.1µF capacitor to DGND.D0Three-State Digital Data Output (LSB)D1Three-State Digital Data OutputD2Three-State Digital Data OutputD3Three-State Digital Data OutputD4Three-State Digital Data OutputD5Three-State Digital Data OutputD6Three-State Digital Data OutputD7Three-State Digital Data Output
Figure 1. Load Circuits
1mA
DGND
HIGH-Z TO VOH,
VOL TO VOH, AND
VOH TO HIGH-Z
CLOAD = 20pF
D0–D15
1mA
DVDD
DGND
HIGH-Z TO VOL,
VOH TO VOL, AND
VOL TO HIGH-Z
CLOAD = 20pF
D0–D15
MAX1179/MAX1187/MAX1189
Track and Hold (T/H)In track mode, the internal hold capacitor acquires the
analog signal (see Figure 4). In hold mode, the T/H
switches open and the capacitive DAC samples the
analog input. During the acquisition, the analog input
(AIN) charges capacitor CHOLD. The acquisition ends
on the second falling edge of CS. At this instant, the
T/H switches open. The retained charge on CHOLDrep-
resents a sample of the input. In hold mode, the capac-
itive DAC adjusts during the remainder of the
conversion time to restore node T/H OUT to zero within
the limits of a 16-bit resolution. Force CSlow to put
valid data on the bus after conversion is complete.
Power-Down ModesSelect standby mode or shutdown mode with R/Cduring
the second falling edge of CS(see SelectingStandby or
Shutdown Modesection). The MAX1179/MAX1187/
MAX1189 automatically enter either standby mode (ref-
erence and buffer on) or shutdown (reference and buffer
off) after each conversion depending on the status of
R/Cduring the second falling edge of CS.
Internal ClockThe MAX1179/MAX1187/MAX1189 generate an internal
conversion clock to free the microprocessor from the bur-
den of running the SAR conversion clock. Total conver-
sion time after entering hold mode (second falling edge of
CS) to end-of-conversion (EOC) falling is 4.7µs (max).
Applications Information
Starting a Conversionand R/Ccontrol acquisition and conversion in the
MAX1179/MAX1187/MAX1189 (see Figure 2). The first
falling edge of CSpowers up the device and puts it in
acquire mode if R/Cis low. The convert start (CS) is
ignored if R/Cis high. The MAX1179/MAX1187/
MAX1189 need at least 12ms (CREFADJ= 0.1µF, CREF
= 10µF) for the internal reference to wake up and settle
before starting the conversion, if powering up from
shutdown. Reset the MAX1179/MAX1187/ MAX1189 by
toggling RESET with CShigh. The next falling edge ofbegins acquisition.
Selecting Standby or Shutdown ModeThe MAX1179/MAX1187/MAX1189 have a selectable
standby or low-power shutdown mode. In standby
mode, the ADC’s internal reference and reference
buffer do not power down between conversions, elimi-
nating the need to wait for the reference to power up
before performing the next conversion. Shutdown mode
powers down the reference and reference buffer after
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input RangeFigure 2. MAX1179/MAX1187/MAX1189 Timing Diagram
tCSLtCSH
tACQ
tDH
R/C
EOC
D0–D15
tDStDVtEOC
tDOtBRtCONVHIGH-Z
REF POWER-
DOWN CONTROL
HIGH-Z
DATA VALID
Figure 3. Typical Application Circuit for the MAX1179/MAX1187/
MAX1189
MAX1179
MAX1187
MAX1189
ANALOG
INPUTAIN
AVDD
+5V ANALOG+5V DIGITAL
DVDD
D0–D1516-BIT
WIDE
μP DATA
BUS
10μF
0.1μF0.1μF
0.1μF
R/C
AGNDDGND
REFADJ
REF
EOC
RESET
